Sorry, your browser is unable to play this video.
Please install Adobe Flash™ and try again.
Alternatively upgrade to a modern browser.

Alastair Cook praises England's performance after they beat South Africa in the Champions Trophy semi-final on Wednesday. Speaking at a press conference following the match, England's captain says it was 'a very, very professional performance from the lads', singling out Jonathan Trott for his steadying presence, which proved key to England's pursuit. The second semi-final between world champions India and Sri Lanka takes place on Thursday in Cardiff